East Midtown-Turtle Bay, Manhattan

East Midtown-Turtle Bay's building-age file leans further into the mid-century construction boom than any other recent era on record: 17% of the recorded stock dates from 1945 to 1975, well ahead of the 6% built since 2000. The rest runs older still — a median construction year of 1920, with 69% of buildings predating 1940, the smallest of the neighborhood's own three era shares even though it remains the majority of the file.

Building-class records show an even split at the top: 19% of structures classed as walk-up apartment buildings and another 19% as elevator apartment buildings, with 11% under a separate classification. The land-use file puts 35% of the roughly 1,100 tax lots under mixed residential-and-commercial use, with 19% recorded as commercial-and-office use and 15% as multi-family elevator use. 71% carry a residential designation, and those lots together hold 40,400 housing units on a median lot size of 2,640 square feet, a footprint just above the neighboring rowhouse-scale files and consistent with the elevator-apartment share recorded here.

Height runs higher here than the 5-story median alone suggests: 35% of buildings rise above 6 floors, a wide gap between the typical block and its taller outliers, and consistent with the postwar-boom share described above. Just 2% of lots sit inside a mapped historic district, a thin layer of design review over a mostly prewar and postwar-boom building stock, meaning most alterations here are governed by zoning rather than a historic-district review process.

Just 1% of lots carry a mapped flood designation, a small figure describing the current federal map rather than any specific building's actual drainage or storm history. Development records show 67% of lots carrying recorded floor area below their zoning allowance, with a median residual of 1.6 in floor-area ratio still on file, a margin that sits above what the mostly older building stock has used to date. Lot sizes cluster around a 2,640-square-foot median, running up to 17,573 square feet at the larger end. The neighborhood borders Midtown-Times Square to the west, Murray Hill-Kips Bay to the south, and the Upper East Side-Carnegie Hill and Upper East Side-Lenox Hill-Roosevelt Island to the north — a stretch where the recorded building-age mix shifts from this neighborhood's postwar-boom concentration to the older stock typical of the blocks around it.